3amp fuse in the circuit board blows every time I turrn the unit on

Asked by Randy on 04/27/2009 1  Answer

ManualsOnline posted an answer 15 years, 5 months ago

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0 Same problem. Brand new home. Found problem myself. Four wire thermostat cable had blue wire connected to "c" terminal at furnace control board but it was connected to "b" terminal at thermostat. Put wire on "c" terminal at thermostat, changed 3 amp fuse and system works now. You may have to press a reset button or two in the furnace. I had to reset the one on the draft inducer.
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